Somtimes you need to configure or reconfigure your network settings. What options are available for doing that? In Redhat (applies to Fedora & Centos too), there are 3 different methods for configuring the network settings:

The GUI Tool

You can also launch the system-config-network tool in GUI mode. From a command line where you are running X-Windows, type system-config-network, or chose System / Administration / Network from the menu. You should see: